Got new internet service at the office a few years back, and got a bundled 'phone number'. One of the guys at the office (coworking space) needed heavy fax so... we got him the line and a fax machine. 18 months later, he left, and... owed me money. I tried to cancel the phone line part, but was told it was "bundled", and the 'internet only' service was now $10 more than the old bundle service.
I called every 4-6 months to ask for the service to be removed and to get lower pricing. Nope. Nope. Nope.
A few months ago I called and explained the situation to the woman. I then said "fine - give me the higher price. I just don't care any more. Joe still owes me $500, and every time I see that stupid phone line on the bill, I think of Joe and I can't deal with that any more. Charge me more money so I don't have to think about Joe any more."
She laughed. A bit. Well... chuckled any way. "hang on, let me look up some stuff..." Silence. "Are you there?" I asked. "Yes, just give me a moment". More silence. I waited. And... started to play guitar. Just strummed a few chords.
She laughed again. "What's that?"
"I'm playing my own hold music, since you don't have any on your end".
I got a strong chuckle out of that.
"Any requests? Any favorite chords?"
"B".
So I played a B chord.
Then waited a bit longer.
"OK, I can get you back on the previous bundled price, but without the phone line any longer. Will there be anything else?"
SUCCESS! It just took 15 months of calling and a B chord.